netdev - Re: [PATCH 0/10] af_unix: add multicast and filtering features to AF

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Date:	Mon, 5 Mar 2012 16:49:38 +0100
From:	Martin Mares <mj@....cz>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Luiz Augusto von Dentz <luiz.dentz@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>, shemminger@...tta.com,
	ying.xue@...driver.com, rodrigo.moya@...labora.co.uk,
	javier@...labora.co.uk, lennart@...ttering.net,
	kay.sievers@...y.org, alban.crequy@...labora.co.uk,
	bart.cerneels@...labora.co.uk, sjoerd.simons@...labora.co.uk,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Marcel Holtmann <marcel@...tmann.org>
Subject: Re: [PATCH 0/10] af_unix: add multicast and filtering features to
 AF_UNIX

Hello!

> We still don't have performance numbers for D-bus using AF_UNIX
> multicast since our D-bus daemon branch is still not stable. But Alban
> did some tests for the first approach (creating a new socket address
> family AF_DBUS) and the performance gain was x1.8 for KVM/i386 and x3
> for N900/ARM.

I did not ask for the performance improvement in artificial benchmarks,
they will obviously show some :)

What I am interested in is a test showing that _in_real_world_, the system
spends considerable amount of time by passing messages. That is, a reason
for optimizing the thing at all.

				Have a nice fortnight
-- 
Martin `MJ' Mares                          <mj@....cz>   http://mj.ucw.cz/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
American patent law: two monkeys, fourteen days.
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